| 随机介质理论预测近距离平行盾构引起的地表沉降 |
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| 引用本文： | 魏 纲,周杨侃.随机介质理论预测近距离平行盾构引起的地表沉降[J].岩土力学,2016,37(Z2):113-119. |
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| 作者姓名： | 魏 纲 周杨侃 |
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| 作者单位： | 浙江大学城市学院 土木工程系，浙江 杭州 310015 |
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| 基金项目： | 浙江省科技厅公益技术研究项目（No.2016C33051）；住房和城乡建设部2015年科学技术项目计划（No.2015-K5-026）。 |
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| 摘 要： | 提出近距离双线水平平行盾构施工引起的总的地表沉降曲线符合正态分布规律。基于单线随机介质理论简化公式，针对现有不足，建立修正的随机介质理论简化计算公式，可以计算近距离双线平行盾构施工引起的地表沉降，同时能够考虑沉降曲线的不对称性，对计算参数取值进行了探讨。算例分析结果表明，文中方法预测值与实测值比较吻合，且计算比较简便。实测数据统计结果表明，先行隧道开挖后双线隧道的半径收敛值比先行隧道半径收敛值要大，而主要影响角则变小；提出可直接用于近距离界定的式（6），认为双线隧道的地表沉降曲线形状与P值大小有关，近距离的界定范围为 。
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| 关 键 词： | 双线平行盾构 隧道 地表沉降 随机介质理论 |
| 收稿时间： | 2014-12-23 |
A simplified method for predicting ground settlement caused by adjacent parallel twin shield tunnel construction based on stochastic medium theory |
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| WEI Gang,ZHOU Yang-kan.A simplified method for predicting ground settlement caused by adjacent parallel twin shield tunnel construction based on stochastic medium theory[J].Rock and Soil Mechanics,2016,37(Z2):113-119. |
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| Authors: | WEI Gang ZHOU Yang-kan |
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| Institution: | Department of Civil Engineering, Zhejiang University City College, Hangzhou, Zhejiang 310015, China |
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| Abstract: | Total ground settlement caused by adjacent level parallel twin shield tunnel construction which conforms to the normal distribution curve is put forward. Based on the stochastic medium theory of single tunnel, aiming at the existing deficiencies, a modified simplified method of stochastic medium theory is established to calculate its ground settlement caused by adjacent level parallel twin shield tunnel construction; and it is able to consider the settlement curve asymmetry at the same time. As is shown in analytical calculation, the proposed method is relatively consistent with the measured values; and the calculation is relatively simple. The calculation parameters are studied; and measured data statistical results show that the radial constringency of twin shield tunnel is greater than the first tunnel; but the influential angle becomes smaller due to impacts of the first tunnel construction. Formula (6) is proposed to define the distance range and the total ground settlement curve shape is connected to the value of P. The definition of distance range is when P less than or equal to 1.1. |
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| Keywords: | double-line parallel shield tunnel ground settlement stochastic medium theory |
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